Fire extinguisher



Sfipt 18,1923; 31 4683163 I. M. MATSON I FIRE EXTINGUISHER Filed March 22. 1922- Patented Sept. 3, l2.

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FIRE EXTINGUISHER.

Application filled march 22, 1922. aerial No. 545337.

burning objects, and thereby broken and releasing a fire extinguishing liquid. The object of the invention is to improve this type of fire extinguisher by providing for the efficient spraying of the liquid when the container is broken.

The objects of the invention are accomplished by the device shown in the accompanying drawing, which represents in elevation the improved extinguisher supported in a bracket which is shown partly in section.

The invention ma be carried into efiect by means of any suitable fragile container such as a glass bulb, spherical or preferably gourd-shaped to provide a suitable handle, this bulb being partly filled with a fire extinguishing liquid such as carbon tetrachlorid, and having the air exhausted therefrom in the manner of an electric lamp. In the use of the device it is thrown against burning surfaces, and thereby broken. The explosive effect due to the inrushing of air results in the effective spreading of the liquid and smothering of the fire.

A preferred form as illustrated in the drawings consists of a thin gourd-shaped glass container 1, having a bulbous body part 2, and cylindrical handle 3 of less diameterthan the part 2. The container is sealed from the outer atmosphere at its ends 4 and 5 in the same manner as an electric lamp bulb. It is preferably about twothirds filled with a fire extinguishing liquid such as carbon tetrachlorid, the surface of which is indicated by the line 6. The air is exhausted from the space 7 above the liquid. The extinguisher is shown supported by a wall bracket 8 which encircles the handle 3.

. In the use of the extinguisher it is broken by being thrown against a burning surface. The. explosive effect due to the inrush of the air into the space from which the air had been exhausted results in the li uid being widely spread, and therefore, utilized to the maximum degree. The objection to the usual fire extinguisher of this general class is that when it is broken the liquid falls and is not utilized to the maximum degree, this being due to having no provision for producing the explosive eiii'ect above described.

I claim:

1. A fire extinguisher comprising a fragile container partly filled with a fire extinguishing liquid, and-the remainder of the container havin the air partially or completely exhauste therefrom.

2. A fire extinguisher comprising a glass container sealed from the outer atmosphere and containing therein a liquid under less than atmospheric pressure.

3. A fire extinguisher comprising a gourds shaped fragile container having a fire extinguishing liquid therein under less than atmospheric pressure.

Signed at Chicago this 20th day of March, 1922.

IVAN M. MATSON. 

